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Finding the Fourth Proportional to 38,666.57, 53,359.85 and 21,899.57

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Solution

The fourth proportional to 38,666.57, 53,359.85 and 21,899.57 is: 30,221.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,666.57 : 53,359.85 = 21,899.57 : x
  2. Step 2: Convert to fraction form
    38,666.57/53,359.85 = 21,899.57/x
  3. Step 3: Cross multiply
    38,666.57x = 53,359.85 × 21,899.57
  4. Step 4: Simplify right side
    38,666.57x = 1,168,557,660.77
  5. Step 5: Solve for x
    x = 1,168,557,660.77/38,666.57
  6. Step 6: Final answer
    x = 30,221.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.